Numerical study of directional heat transfer in composite materials via controllable carbon fiber distribution

Carbon fiber reinforced polyamide 12(CF/PA12),a new material renowned for its excellent mechanical and thermal properties,has drawn significant industry attention.Using the steady-state research to heat transfer,a series of simulations to investigate the heat transfer properties of CF/PA12 were conducted in this study.Firstly,by building two-and three-dimensional models,the effects of the porosity,carbon fiber content,and arrangement on the heat transfer of CF/PA12 were examined.A validation of the simulation model was carried out and the findings were consistent with those of the experiment.Then,the simulation results using the above models showed that within the volume fraction from 0% to 28%,the thermal conductivity of CF/PA12 increased greatly from 0.0242 W/(m·K)to 10.8848 W/(m·K).The increasing porosity had little influence on heat transfer characteristic of CF/PA12.The direction of the carbon fiber arrangement affects the heat transfer impact,and optimal outcomes were achieved when the heat flow direction was parallel to the carbon fiber.This research contributes to improving the production methods and broadening the application scenarios of composite materials.

碳纤维基复合材料热敏开关光热转换及焦耳热特性研究

碳纤维基复合材料(CFC)因其优异的力学性能而受到广泛关注,广泛应用于航空航天、交通运输、军工等各个领域。然而,对碳纤维基复合材料光电转换的潜在机制和影响因素的研究却很少。本研究采用选择性激光烧结法制备了碳纤维增强聚酰胺12(CF/PA12)复合材料。结果表明,当碳纤维质量分数为15%时,CF/PA12复合材料具有良好的光热转换和焦耳加热特性。随着太阳强度的增加,CF/PA12复合材料的温度逐渐升高,当CF/PA12平行于光向取向时温度达到最高。本研究还证明了CF/PA12纤维取向对材料电阻和热阻的选择性调节。设计了一种集成光热转换的电压连续可调模式,并通过可循环试验进行了验证。本研究结果拓展了碳纤维增强聚合物复合材料在温度调节和操作控制方面的应用。